title: Thio-phene-2-carbonyl azide.
abstract: The title compound, C5H3N3OS, is almost planar (r.m.s. deviation for the ten non-H atoms = 0.018 Å) and forms an extended layer structure in the (100) plane, held together via hydrogen-bonding inter-actions between adjacent mol-ecules. Of particular note is the occurrence of RC-H⋯N(-)=N(+)=NR inter-actions between an aromatic C-H group and an azide moiety which, in conjunction with a complementary C-H⋯O=C inter-action, forms a nine-membered ring.
authors.affiliation: Department of Chemistry & Biochemistry, Texas Tech University, Memorial Circle & Boston, Lubbock, TX 79409, USA.
authors.forename: Gene C
authors.initials: GC
authors.lastname: Hsu
authors.forename: Laci M
authors.initials: LM
authors.lastname: Singer
authors.forename: David B
authors.initials: DB
authors.lastname: Cordes
authors.forename: Michael
authors.initials: M
authors.lastname: Findlater